I recently upgraded to Unraid 6 and I'm loving it so far. I also needed to add another drive to my array cause i was low on space. I started the process of converting my old drives to XFS to match the new drive that I added. So far i copied disk 1 to disk 4 with no incident and once Disk 1 was completely empty i stopped the array and formatted as XFS. I noticed now though that the used space on the disk is much higher than pre-format and the disk is still showing empty. As ReiserFS Disk 1 showed 94MB used when empty. Now as XFS is shows 1.01GB used. Is there is a reason why it would take so much space? I didnt see this when I formatted disk 4 to XFS. That had about 99MB used when empty.

 

Array:

Parity 3TB

Disk1 2TB XFS

Disk2 2TB ReiserFS

Disk3 2TB ReiserFS

Disk4 3TB XFS

Cache 240GB

I think that is just inherent in XFS.  Probably it pre-allocates more directory structures rather than creating them dynamically, but I am not sure.

 

The figure you quote is still relatively trivial in comparison to the total size of the drives.

im not so much concerned that theres 1GB unusable on the drive, more so that this drive shows 10x more used space when empty then another drive in the same format. That made me do a double take before i start copying data back there.

im not so much concerned that theres 1GB unusable on the drive, more so that this drive shows 10x more used space when empty then another drive in the same format. That made me do a double take before i start copying data back there.

Well, many people have noted that they have seen 2GB used on a freshly formatted disk (presumably larger drives) so the figure is not unexpected.

Ok thanks good to know